PHysics of Oscillating STars
Published November 30, 2018 | Version v1
Conference paper Open

Evolutionary stage of the massive component of the double-lined eclipsing binary V380 Cygni

Authors/Creators

  • 1. Astronomical Institute of the Wrocław University, Kopernika 11, PL-51-622 Wrocław, Poland

Description

We determine the age of the eclipsing binary V380 Cygni, whose components have a significant mass ratio, $M_B/M_A\approx$ 0.6. 
Because this binary exhibits spectral lines of both components, the values of masses and radii could be determined with a very high accuracy. Assuming that both components are on the main sequence, we derive the age of about 16 Myr.
However, in this case the primary needs a large overshooting from the convective core ($f_{\rm{ov}} \approx 0.04$) and higher metallicity ($Z \approx 0.02$). It is difficult to tell whether such a high value of overshooting from the convective core is reliable or rather mimics other mixing processes, which took place on the whole main sequence evolution, e.g., resulting from diffusion, rotation etc. If the primary is already in the overall contraction phase or just after, then the age of the system is about 13 Myr.
Based on the available observations, we cannot resolve what is the evolutionary stage of the V380 Cyg system.
The analysis of the {\it Kepler} light curve does not show any significant periodicity besides the orbital frequency and, most probably, 
the rotational frequency and their multiplets.

Files

V380_Cyg.pdf

Files (584.6 kB)

Name Size Download all
md5:0054f04abb702f844ce0815a767d28fd
584.6 kB Preview Download

Additional details

References

  • Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. 2009, An- nual Review of Astronomy and Astrophysics, 47, 481.
  • Batten, A. H. 1962, Publications of the Dominion Astrophys- ical Observatory Victoria, 12, 91.
  • Claret, A. 2007, A&A, 475, 1019.
  • Daszyńska-Daszkiewicz, J. & Miszuda, A. 2018, submitted to MNRAS.
  • Guinan, E. F., Ribas, I., Fitzpatrick, E. L., Giménez, Á., Jordi, C., et al. 2000, ApJ, 544, 409.
  • Herwig, F. 2000, A&A, 360, 952.
  • Høg, E., Fabricius, C., Makarov, V. V., Urban, S., Corbin, T., et al. 2000, A&A, 355, L27.
  • Iglesias, C. A. & Rogers, F. J. 1996, ApJ, 464, 943.
  • Langer, N., El Eid, M. F., & Fricke, K. J. 1985, A&A, 145, 179.
  • Langer, N., Fricke, K. J., & Sugimoto, D. 1983, A&A, 126, 207
  • Nieva, M. F. & Przybilla, N. 2012, A&A, 539, A143.
  • Pavlovski, K., Tamajo, E., Koubský, P., Southworth, J., Yang, S., et al. 2009, MNRAS, 400, 791.
  • Paxton, B., Bildsten, L., Dotter, A., Herwig, F., Lesaffre, P., et al. 2011, The Astrophysical Journal Supplement Series, 192, 3.
  • Paxton, B., Cantiello, M., Arras, P., Bildsten, L., Brown, E. F., et al. 2013, The Astrophysical Journal Supplement Series, 208, 4.
  • Paxton, B., Marchant, P., Schwab, J., Bauer, E. B., Bildsten, L., et al. 2015, The Astrophysical Journal Supplement Series, 220, 15.
  • Popper, D. M. & Guinan, E. F. 1998, PASP, 110, 572.
  • Prugniel, P., Vauglin, I., & Koleva, M. 2011, A&A, 531, A165.
  • Ramella, M., Giuricin, G., Mardirossian, F., & Mezzetti, M. 1980, Ap&SS, 71, 385.
  • Szewczuk, W. & Daszyńska-Daszkiewicz, J. 2018, MNRAS, 478, 2243.
  • Tkachenko, A., Degroote, P., Aerts, C., Pavlovski, K., South- worth, J., et al. 2014, MNRAS, 438, 3093.
  • Vink, J. S., de Koter, A., & Lamers, H. J. G. L. M. 2001, A&A, 369, 574.
  • Wilson, R. E. & Devinney, E. J. 1971, ApJ, 166, 605.
  • Wilson, R. E. & Van Hamme, W. 2014, ApJ, 780, 151.